import os
import unittest
from unittest import mock

from sqlglot import parse_one, transpile
from sqlglot.errors import ErrorLevel, ParseError, UnsupportedError
from sqlglot.helper import logger as helper_logger
from sqlglot.parser import logger as parser_logger
from tests.helpers import (
    assert_logger_contains,
    load_sql_fixture_pairs,
    load_sql_fixtures,
)


class TestTranspile(unittest.TestCase):
    file_dir = os.path.dirname(__file__)
    fixtures_dir = os.path.join(file_dir, "fixtures")
    maxDiff = None

    def validate(self, sql, target, **kwargs):
        self.assertEqual(transpile(sql, **kwargs)[0], target)

    def test_weird_chars(self):
        self.assertEqual(transpile("0Êß")[0], "0 AS Êß")
        self.assertEqual(
            # Ideographic space after SELECT (\u3000)
            transpile("SELECT　* FROM t WHERE c = 1")[0],
            "SELECT * FROM t WHERE c = 1",
        )

    def test_alias(self):
        self.assertEqual(transpile("SELECT SUM(y) KEEP")[0], "SELECT SUM(y) AS KEEP")
        self.assertEqual(transpile("SELECT 1 overwrite")[0], "SELECT 1 AS overwrite")
        self.assertEqual(transpile("SELECT 1 is")[0], "SELECT 1 AS is")
        self.assertEqual(transpile("SELECT 1 current_time")[0], "SELECT 1 AS current_time")
        self.assertEqual(
            transpile("SELECT 1 current_timestamp")[0], "SELECT 1 AS current_timestamp"
        )
        self.assertEqual(transpile("SELECT 1 current_date")[0], "SELECT 1 AS current_date")
        self.assertEqual(transpile("SELECT 1 current_datetime")[0], "SELECT 1 AS current_datetime")
        self.assertEqual(transpile("SELECT 1 row")[0], "SELECT 1 AS row")

        self.assertEqual(
            transpile("SELECT 1 FROM a.b.table1 t UNPIVOT((c3) FOR c4 IN (a, b))")[0],
            "SELECT 1 FROM a.b.table1 AS t UNPIVOT((c3) FOR c4 IN (a, b))",
        )

        for key in ("union", "from", "join"):
            with self.subTest(f"alias {key}"):
                self.validate(f"SELECT x AS {key}", f"SELECT x AS {key}")
                self.validate(f'SELECT x "{key}"', f'SELECT x AS "{key}"')

                with self.assertRaises(ParseError):
                    self.validate(f"SELECT x {key}", "")

    def test_unary(self):
        self.validate("+++1", "1")
        self.validate("+-1", "-1")
        self.validate("+- - -1", "- - -1")

    def test_paren(self):
        with self.assertRaises(ParseError):
            transpile("1 + (2 + 3")
            transpile("select f(")

    def test_some(self):
        self.validate(
            "SELECT * FROM x WHERE a = SOME (SELECT 1)",
            "SELECT * FROM x WHERE a = ANY(SELECT 1)",
        )

    def test_leading_comma(self):
        self.validate(
            "SELECT a, b, c FROM (SELECT a, b, c FROM t)",
            "SELECT\n"
            "    a\n"
            "    , b\n"
            "    , c\n"
            "FROM (\n"
            "    SELECT\n"
            "        a\n"
            "        , b\n"
            "        , c\n"
            "    FROM t\n"
            ")",
            leading_comma=True,
            pretty=True,
            pad=4,
            indent=4,
        )
        self.validate(
            "SELECT FOO, BAR, BAZ",
            "SELECT\n  FOO\n  , BAR\n  , BAZ",
            leading_comma=True,
            pretty=True,
        )
        self.validate(
            "SELECT FOO, /*x*/\nBAR, /*y*/\nBAZ",
            "SELECT\n  FOO /* x */\n  , BAR /* y */\n  , BAZ",
            leading_comma=True,
            pretty=True,
        )
        # without pretty, this should be a no-op
        self.validate(
            "SELECT FOO, BAR, BAZ",
            "SELECT FOO, BAR, BAZ",
            leading_comma=True,
        )

    def test_space(self):
        self.validate("SELECT MIN(3)>MIN(2)", "SELECT MIN(3) > MIN(2)")
        self.validate("SELECT MIN(3)>=MIN(2)", "SELECT MIN(3) >= MIN(2)")
        self.validate("SELECT 1>0", "SELECT 1 > 0")
        self.validate("SELECT 3>=3", "SELECT 3 >= 3")
        self.validate("SELECT a\r\nFROM b", "SELECT a FROM b")

    def test_comments(self):
        self.validate(
            "select /* asfd /* asdf */ asdf */ 1",
            "/* asfd /* asdf */ asdf */ SELECT 1",
        )
        self.validate(
            "SELECT c /* foo */ AS alias",
            "SELECT c AS alias /* foo */",
        )
        self.validate(
            "SELECT c AS /* foo */ (a, b, c) FROM t",
            "SELECT c AS (a, b, c) /* foo */ FROM t",
        )
        self.validate(
            "SELECT * FROM t1\n/*x*/\nUNION ALL SELECT * FROM t2",
            "SELECT * FROM t1 /* x */ UNION ALL SELECT * FROM t2",
        )
        self.validate(
            "/* comment */ SELECT * FROM a UNION SELECT * FROM b",
            "/* comment */ SELECT * FROM a UNION SELECT * FROM b",
        )
        self.validate(
            "SELECT * FROM t1\n/*x*/\nINTERSECT ALL SELECT * FROM t2",
            "SELECT * FROM t1 /* x */ INTERSECT ALL SELECT * FROM t2",
        )
        self.validate(
            "SELECT\n  foo\n/* comments */\n;",
            "SELECT foo /* comments */",
        )
        self.validate(
            "SELECT * FROM a INNER /* comments */ JOIN b",
            "SELECT * FROM a /* comments */ INNER JOIN b",
        )
        self.validate(
            "SELECT * FROM a LEFT /* comment 1 */ OUTER /* comment 2 */ JOIN b",
            "SELECT * FROM a /* comment 1 */ /* comment 2 */ LEFT OUTER JOIN b",
        )
        self.validate(
            "SELECT CASE /* test */ WHEN a THEN b ELSE c END",
            "SELECT CASE WHEN a THEN b ELSE c END /* test */",
        )
        self.validate("SELECT 1 /*/2 */", "SELECT 1 /* /2 */")
        self.validate("SELECT */*comment*/", "SELECT * /* comment */")
        self.validate(
            "SELECT * FROM table /*comment 1*/ /*comment 2*/",
            "SELECT * FROM table /* comment 1 */ /* comment 2 */",
        )
        self.validate("SELECT 1 FROM foo -- comment", "SELECT 1 FROM foo /* comment */")
        self.validate("SELECT --+5\nx FROM foo", "/* +5 */ SELECT x FROM foo")
        self.validate("SELECT --!5\nx FROM foo", "/* !5 */ SELECT x FROM foo")
        self.validate(
            "SELECT 1 /* inline */ FROM foo -- comment",
            "SELECT 1 /* inline */ FROM foo /* comment */",
        )
        self.validate(
            "SELECT FUN(x) /*x*/, [1,2,3] /*y*/", "SELECT FUN(x) /* x */, ARRAY(1, 2, 3) /* y */"
        )
        self.validate(
            """
            SELECT 1 -- comment
            FROM foo -- comment
            """,
            "SELECT 1 /* comment */ FROM foo /* comment */",
        )
        self.validate(
            """
            SELECT 1 /* big comment
             like this */
            FROM foo -- comment
            """,
            """SELECT 1 /* big comment
             like this */ FROM foo /* comment */""",
        )
        self.validate(
            "select x from foo --       x",
            "SELECT x FROM foo /*       x */",
        )
        self.validate(
            """select x, --
            from foo""",
            "SELECT x FROM foo",
        )
        self.validate(
            """
-- comment 1
-- comment 2
-- comment 3
SELECT * FROM foo
            """,
            "/* comment 1 */ /* comment 2 */ /* comment 3 */ SELECT * FROM foo",
        )
        self.validate(
            """
-- comment 1
-- comment 2
-- comment 3
SELECT * FROM foo""",
            """/* comment 1 */ /* comment 2 */ /* comment 3 */
SELECT
  *
FROM foo""",
            pretty=True,
        )
        self.validate(
            """
SELECT * FROM tbl /*line1
line2
line3*/ /*another comment*/ where 1=1 -- comment at the end""",
            """SELECT * FROM tbl /* line1
line2
line3 */ /* another comment */ WHERE 1 = 1 /* comment at the end */""",
        )
        self.validate(
            """
SELECT * FROM tbl /*line1
line2
line3*/ /*another comment*/ where 1=1 -- comment at the end""",
            """SELECT
  *
FROM tbl /* line1
line2
line3 */ /* another comment */
WHERE
  1 = 1 /* comment at the end */""",
            pretty=True,
        )
        self.validate(
            """
            /* multi
               line
               comment
            */
            SELECT
              tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
              CAST(x AS CHAR), # comment 3
              y               -- comment 4
            FROM
              bar /* comment 5 */,
              tbl #          comment 6
            """,
            """/* multi
               line
               comment
            */
SELECT
  tbl.cola /* comment 1 */ + tbl.colb /* comment 2 */,
  CAST(x AS CHAR), /* comment 3 */
  y /* comment 4 */
FROM bar /* comment 5 */, tbl /*          comment 6 */""",
            read="mysql",
            pretty=True,
        )
        self.validate(
            """
            SELECT a FROM b
            WHERE foo
            -- comment 1
            AND bar
            -- comment 2
            AND bla
            -- comment 3
            LIMIT 10
            ;
            """,
            "SELECT a FROM b WHERE foo AND /* comment 1 */ bar AND /* comment 2 */ bla LIMIT 10 /* comment 3 */",
        )
        self.validate(
            """
            SELECT a FROM b WHERE foo
            -- comment 1
            """,
            "SELECT a FROM b WHERE foo /* comment 1 */",
        )
        self.validate(
            """
            select a
            -- from
            from b
            -- where
            where foo
            -- comment 1
            and bar
            -- comment 2
            and bla
            """,
            """SELECT
  a
/* from */
FROM b
/* where */
WHERE
  foo AND /* comment 1 */ bar AND /* comment 2 */ bla""",
            pretty=True,
        )
        self.validate(
            """
            -- test
            WITH v AS (
              SELECT
                1 AS literal
            )
            SELECT
              *
            FROM v
            """,
            """/* test */
WITH v AS (
  SELECT
    1 AS literal
)
SELECT
  *
FROM v""",
            pretty=True,
        )
        self.validate(
            "(/* 1 */ 1 ) /* 2 */",
            "(1) /* 1 */ /* 2 */",
        )
        self.validate(
            "select * from t where not a in (23) /*test*/ and b in (14)",
            "SELECT * FROM t WHERE NOT a IN (23) /* test */ AND b IN (14)",
        )
        self.validate(
            "select * from t where a in (23) /*test*/ and b in (14)",
            "SELECT * FROM t WHERE a IN (23) /* test */ AND b IN (14)",
        )
        self.validate(
            "select * from t where ((condition = 1)/*test*/)",
            "SELECT * FROM t WHERE ((condition = 1) /* test */)",
        )
        self.validate(
            "SELECT 1 // hi this is a comment",
            "SELECT 1 /* hi this is a comment */",
            read="snowflake",
        )
        self.validate(
            "-- comment\nDROP TABLE IF EXISTS foo",
            "/* comment */ DROP TABLE IF EXISTS foo",
        )
        self.validate(
            """
            -- comment1
            -- comment2

            -- comment3
            DROP TABLE IF EXISTS db.tba
            """,
            """/* comment1 */ /* comment2 */ /* comment3 */
DROP TABLE IF EXISTS db.tba""",
            pretty=True,
        )
        self.validate(
            """
            -- comment4
            CREATE TABLE db.tba AS
            SELECT a, b, c
            FROM tb_01
            WHERE
            -- comment5
              a = 1 AND b = 2 --comment6
              -- and c = 1
            -- comment7
            ;
            """,
            """/* comment4 */
CREATE TABLE db.tba AS
SELECT
  a,
  b,
  c
FROM tb_01
WHERE
  a /* comment5 */ = 1 AND b = 2 /* comment6 */ /* and c = 1 */ /* comment7 */""",
            pretty=True,
        )
        self.validate(
            """
            SELECT
               -- This is testing comments
                col,
            -- 2nd testing comments
            CASE WHEN a THEN b ELSE c END as d
            FROM t
            """,
            """SELECT
  col, /* This is testing comments */
  CASE WHEN a THEN b ELSE c END AS d /* 2nd testing comments */
FROM t""",
            pretty=True,
        )
        self.validate(
            """
            SELECT * FROM a
            -- comments
            INNER JOIN b
            """,
            """SELECT
  *
FROM a
/* comments */
INNER JOIN b""",
            pretty=True,
        )
        self.validate(
            "SELECT * FROM a LEFT /* comment 1 */ OUTER /* comment 2 */ JOIN b",
            """SELECT
  *
FROM a
/* comment 1 */ /* comment 2 */
LEFT OUTER JOIN b""",
            pretty=True,
        )
        self.validate(
            "SELECT\n  a /* sqlglot.meta case_sensitive */ -- noqa\nFROM tbl",
            """SELECT
  a /* sqlglot.meta case_sensitive */ /* noqa */
FROM tbl""",
            pretty=True,
        )
        self.validate(
            """
SELECT
  'hotel1' AS hotel,
  *
FROM dw_1_dw_1_1.exactonline_1.transactionlines
/*
    UNION ALL
    SELECT
      'Thon Partner Hotel Jølster' AS hotel,
      name,
      date,
      CAST(identifier AS VARCHAR) AS identifier,
      value
    FROM d2o_889_oupjr_1348.public.accountvalues_forecast
*/
UNION ALL
SELECT
  'hotel2' AS hotel,
  *
FROM dw_1_dw_1_1.exactonline_2.transactionlines""",
            """SELECT
  'hotel1' AS hotel,
  *
FROM dw_1_dw_1_1.exactonline_1.transactionlines
/*
    UNION ALL
    SELECT
      'Thon Partner Hotel Jølster' AS hotel,
      name,
      date,
      CAST(identifier AS VARCHAR) AS identifier,
      value
    FROM d2o_889_oupjr_1348.public.accountvalues_forecast
*/
UNION ALL
SELECT
  'hotel2' AS hotel,
  *
FROM dw_1_dw_1_1.exactonline_2.transactionlines""",
            pretty=True,
        )
        self.validate(
            """/* The result of  some calculations
 */
with
    base as (
        select
            sum(sb.hep_amount) as hep_amount,
            -- I AM REMOVED
            sum(sb.hep_budget)
            /* Budget defined in sharepoint */
            as blub
            , 1 as bla
        from gold.data_budget sb
        group by all
    )
select
    *
from base
""",
            """/* The result of  some calculations
 */
WITH base AS (
  SELECT
    SUM(sb.hep_amount) AS hep_amount,
    SUM(sb.hep_budget) /* I AM REMOVED */ AS blub, /* Budget defined in sharepoint */
    1 AS bla
  FROM gold.data_budget AS sb
  GROUP BY ALL
)
SELECT
  *
FROM base""",
            pretty=True,
        )
        self.validate(
            """-- comment
SOME_FUNC(arg IGNORE NULLS)
  OVER (PARTITION BY foo ORDER BY bla) AS col""",
            "SOME_FUNC(arg IGNORE NULLS) OVER (PARTITION BY foo ORDER BY bla) AS col /* comment */",
            pretty=True,
        )
        self.validate(
            """
            SELECT *
            FROM x
            INNER JOIN y
            -- inner join z
            LEFT JOIN z using (id)
            using (id)
            """,
            """SELECT
  *
FROM x
INNER JOIN y
  /* inner join z */
  LEFT JOIN z
    USING (id)
  USING (id)""",
            pretty=True,
        )
        self.validate(
            """with x as (
  SELECT *
  /*
NOTE: LEFT JOIN because blah blah blah
  */
  FROM a
)
select * from x""",
            """WITH x AS (
  SELECT
    *
  /*
NOTE: LEFT JOIN because blah blah blah
  */
  FROM a
)
SELECT
  *
FROM x""",
            pretty=True,
        )

        self.validate(
            """SELECT X FROM  catalog.db.table WHERE Y
        --
        AND Z""",
            """SELECT X FROM catalog.db.table WHERE Y AND Z""",
        )
        self.validate(
            """with a as /* comment */ ( select * from b) select * from a""",
            """WITH a /* comment */ AS (SELECT * FROM b) SELECT * FROM a""",
        )
        self.validate(
            """
  -- comment at the top
WITH
-- comment for tbl1
tbl1 AS (SELECT 1)
-- comment for tbl2
, tbl2 AS (SELECT 2)
-- comment for tbl3
, tbl3 AS (SELECT 3)
-- comment for final select
SELECT * FROM tbl1""",
            """/* comment at the top */
WITH tbl1 /* comment for tbl1 */ AS (
  SELECT
    1
), tbl2 /* comment for tbl2 */ AS (
  SELECT
    2
), tbl3 /* comment for tbl3 */ AS (
  SELECT
    3
)
/* comment for final select */
SELECT
  *
FROM tbl1""",
            pretty=True,
        )

    def test_types(self):
        self.validate("INT 1", "CAST(1 AS INT)")
        self.validate("VARCHAR 'x' y", "CAST('x' AS VARCHAR) AS y")
        self.validate("STRING 'x' y", "CAST('x' AS TEXT) AS y")
        self.validate("x::INT", "CAST(x AS INT)")
        self.validate("x::INTEGER", "CAST(x AS INT)")
        self.validate("x::INT y", "CAST(x AS INT) AS y")
        self.validate("x::INT AS y", "CAST(x AS INT) AS y")
        self.validate("x::INT::BOOLEAN", "CAST(CAST(x AS INT) AS BOOLEAN)")
        self.validate("interval::int", "CAST(interval AS INT)")
        self.validate("x::user_defined_type", "CAST(x AS user_defined_type)")
        self.validate("CAST(x::INT AS BOOLEAN)", "CAST(CAST(x AS INT) AS BOOLEAN)")
        self.validate("CAST(x AS INT)::BOOLEAN", "CAST(CAST(x AS INT) AS BOOLEAN)")

        with self.assertRaises(ParseError):
            transpile("x::z", read="clickhouse")

    def test_not_range(self):
        self.validate("a NOT LIKE b", "NOT a LIKE b")
        self.validate("a NOT BETWEEN b AND c", "NOT a BETWEEN b AND c")
        self.validate("a NOT IN (1, 2)", "NOT a IN (1, 2)")
        self.validate("a IS NOT NULL", "NOT a IS NULL")
        self.validate("a LIKE TEXT 'y'", "a LIKE CAST('y' AS TEXT)")

    def test_extract(self):
        self.validate(
            "EXTRACT(day FROM '2020-01-01'::TIMESTAMP)",
            "EXTRACT(DAY FROM CAST('2020-01-01' AS TIMESTAMP))",
        )
        self.validate(
            "EXTRACT(timezone FROM '2020-01-01'::TIMESTAMP)",
            "EXTRACT(TIMEZONE FROM CAST('2020-01-01' AS TIMESTAMP))",
        )
        self.validate(
            "EXTRACT(year FROM '2020-01-01'::TIMESTAMP WITH TIME ZONE)",
            "EXTRACT(YEAR FROM CAST('2020-01-01' AS TIMESTAMPTZ))",
        )
        self.validate(
            "extract(month from '2021-01-31'::timestamp without time zone)",
            "EXTRACT(MONTH FROM CAST('2021-01-31' AS TIMESTAMP))",
        )
        self.validate("extract(week from current_date + 2)", "EXTRACT(WEEK FROM CURRENT_DATE + 2)")
        self.validate(
            "EXTRACT(minute FROM datetime1 - datetime2)",
            "EXTRACT(MINUTE FROM datetime1 - datetime2)",
        )

    def test_if(self):
        self.validate(
            "SELECT IF(a > 1, 1, 0) FROM foo",
            "SELECT CASE WHEN a > 1 THEN 1 ELSE 0 END FROM foo",
        )
        self.validate(
            "SELECT IF a > 1 THEN b END",
            "SELECT CASE WHEN a > 1 THEN b END",
        )
        self.validate(
            "SELECT IF a > 1 THEN b ELSE c END",
            "SELECT CASE WHEN a > 1 THEN b ELSE c END",
        )
        self.validate("SELECT IF(a > 1, 1) FROM foo", "SELECT CASE WHEN a > 1 THEN 1 END FROM foo")

    def test_with(self):
        self.validate(
            "WITH a AS (SELECT 1) WITH b AS (SELECT 2) SELECT *",
            "WITH a AS (SELECT 1), b AS (SELECT 2) SELECT *",
        )
        self.validate(
            "WITH a AS (SELECT 1), WITH b AS (SELECT 2) SELECT *",
            "WITH a AS (SELECT 1), b AS (SELECT 2) SELECT *",
        )
        self.validate(
            "WITH A(filter) AS (VALUES 1, 2, 3) SELECT * FROM A WHERE filter >= 2",
            "WITH A(filter) AS (SELECT * FROM (VALUES (1), (2), (3)) AS _values) SELECT * FROM A WHERE filter >= 2",
            read="presto",
        )
        self.validate(
            "SELECT BOOL_OR(a > 10) FROM (VALUES 1, 2, 15) AS T(a)",
            "SELECT BOOL_OR(a > 10) FROM (VALUES (1), (2), (15)) AS T(a)",
            read="presto",
        )

    def test_alter(self):
        self.validate(
            "ALTER TABLE integers ADD k INTEGER",
            "ALTER TABLE integers ADD COLUMN k INT",
        )
        self.validate(
            "ALTER TABLE integers ALTER i TYPE VARCHAR",
            "ALTER TABLE integers ALTER COLUMN i SET DATA TYPE VARCHAR",
        )
        self.validate(
            "ALTER TABLE integers ALTER i TYPE VARCHAR COLLATE foo USING bar",
            "ALTER TABLE integers ALTER COLUMN i SET DATA TYPE VARCHAR COLLATE foo USING bar",
        )

    def test_time(self):
        self.validate("INTERVAL '1 day'", "INTERVAL '1' DAY")
        self.validate("INTERVAL '1 days' * 5", "INTERVAL '1' DAYS * 5")
        self.validate("5 * INTERVAL '1 day'", "5 * INTERVAL '1' DAY")
        self.validate("INTERVAL 1 day", "INTERVAL '1' DAY")
        self.validate("INTERVAL 2 months", "INTERVAL '2' MONTHS")
        self.validate("TIMESTAMP '2020-01-01'", "CAST('2020-01-01' AS TIMESTAMP)")
        self.validate("TIMESTAMP WITH TIME ZONE '2020-01-01'", "CAST('2020-01-01' AS TIMESTAMPTZ)")
        self.validate(
            "TIMESTAMP(9) WITH TIME ZONE '2020-01-01'",
            "CAST('2020-01-01' AS TIMESTAMPTZ(9))",
        )
        self.validate(
            "TIMESTAMP WITHOUT TIME ZONE '2020-01-01'",
            "CAST('2020-01-01' AS TIMESTAMP)",
        )
        self.validate("'2020-01-01'::TIMESTAMP", "CAST('2020-01-01' AS TIMESTAMP)")
        self.validate(
            "'2020-01-01'::TIMESTAMP WITHOUT TIME ZONE",
            "CAST('2020-01-01' AS TIMESTAMP)",
        )
        self.validate(
            "'2020-01-01'::TIMESTAMP WITH TIME ZONE",
            "CAST('2020-01-01' AS TIMESTAMPTZ)",
        )
        self.validate(
            "timestamp with time zone '2025-11-20 00:00:00+00' AT TIME ZONE 'Africa/Cairo'",
            "CAST('2025-11-20 00:00:00+00' AS TIMESTAMPTZ) AT TIME ZONE 'Africa/Cairo'",
        )

        self.validate("DATE '2020-01-01'", "CAST('2020-01-01' AS DATE)")
        self.validate("'2020-01-01'::DATE", "CAST('2020-01-01' AS DATE)")
        self.validate("STR_TO_TIME('x', 'y')", "STRPTIME('x', 'y')", write="duckdb")
        self.validate("STR_TO_UNIX('x', 'y')", "EPOCH(STRPTIME('x', 'y'))", write="duckdb")
        self.validate("TIME_TO_STR(x, 'y')", "STRFTIME(x, 'y')", write="duckdb")
        self.validate("TIME_TO_UNIX(x)", "EPOCH(x)", write="duckdb")
        self.validate(
            "UNIX_TO_STR(123, 'y')",
            "STRFTIME(TO_TIMESTAMP(123), 'y')",
            write="duckdb",
        )
        self.validate(
            "UNIX_TO_TIME(123)",
            "TO_TIMESTAMP(123)",
            write="duckdb",
        )

        self.validate(
            "STR_TO_TIME(x, 'y')",
            "CAST(FROM_UNIXTIME(UNIX_TIMESTAMP(x, 'y')) AS TIMESTAMP)",
            write="hive",
        )
        self.validate(
            "STR_TO_TIME(x, 'yyyy-MM-dd HH:mm:ss')",
            "CAST(x AS TIMESTAMP)",
            write="hive",
        )
        self.validate(
            "STR_TO_TIME(x, 'yyyy-MM-dd')",
            "CAST(x AS TIMESTAMP)",
            write="hive",
        )

        self.validate(
            "STR_TO_UNIX('x', 'y')",
            "UNIX_TIMESTAMP('x', 'y')",
            write="hive",
        )
        self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="hive")

        self.validate("TIME_STR_TO_TIME(x)", "TIME_STR_TO_TIME(x)", write=None)
        self.validate(
            "TIME_STR_TO_TIME(x, 'America/Los_Angeles')",
            "TIME_STR_TO_TIME(x, 'America/Los_Angeles')",
            write=None,
        )
        self.validate("TIME_STR_TO_UNIX(x)", "TIME_STR_TO_UNIX(x)", write=None)
        self.validate("TIME_TO_TIME_STR(x)", "CAST(x AS TEXT)", write=None)
        self.validate("TIME_TO_STR(x, 'y')", "TIME_TO_STR(x, 'y')", write=None)
        self.validate("TIME_TO_UNIX(x)", "TIME_TO_UNIX(x)", write=None)
        self.validate("UNIX_TO_STR(x, 'y')", "UNIX_TO_STR(x, 'y')", write=None)
        self.validate("UNIX_TO_TIME(x)", "UNIX_TO_TIME(x)", write=None)
        self.validate("UNIX_TO_TIME_STR(x)", "UNIX_TO_TIME_STR(x)", write=None)
        self.validate("TIME_STR_TO_DATE(x)", "TIME_STR_TO_DATE(x)", write=None)

        self.validate("TIME_STR_TO_DATE(x)", "TO_DATE(x)", write="hive")
        self.validate("UNIX_TO_STR(x, 'yyyy-MM-dd HH:mm:ss')", "FROM_UNIXTIME(x)", write="hive")
        self.validate("STR_TO_UNIX(x, 'yyyy-MM-dd HH:mm:ss')", "UNIX_TIMESTAMP(x)", write="hive")
        self.validate("IF(x > 1, x + 1)", "IF(x > 1, x + 1)", write="presto")
        self.validate("IF(x > 1, 1 + 1)", "IF(x > 1, 1 + 1)", write="hive")
        self.validate("IF(x > 1, 1, 0)", "IF(x > 1, 1, 0)", write="hive")

        self.validate(
            "TIME_TO_UNIX(x)",
            "UNIX_TIMESTAMP(x)",
            write="hive",
        )
        self.validate("UNIX_TO_STR(123, 'y')", "FROM_UNIXTIME(123, 'y')", write="hive")
        self.validate(
            "UNIX_TO_TIME(123)",
            "FROM_UNIXTIME(123)",
            write="hive",
        )

        self.validate("STR_TO_TIME('x', 'y')", "DATE_PARSE('x', 'y')", write="presto")
        self.validate(
            "STR_TO_UNIX('x', 'y')",
            "TO_UNIXTIME(COALESCE(TRY(DATE_PARSE(CAST('x' AS VARCHAR), 'y')), PARSE_DATETIME(DATE_FORMAT(CAST('x' AS TIMESTAMP), 'y'), 'y')))",
            write="presto",
        )
        self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="presto")
        self.validate("TIME_TO_UNIX(x)", "TO_UNIXTIME(x)", write="presto")
        self.validate(
            "UNIX_TO_STR(123, 'y')",
            "DATE_FORMAT(FROM_UNIXTIME(123), 'y')",
            write="presto",
        )
        self.validate("UNIX_TO_TIME(123)", "FROM_UNIXTIME(123)", write="presto")

        self.validate("STR_TO_TIME('x', 'y')", "TO_TIMESTAMP('x', 'y')", write="spark")
        self.validate("STR_TO_UNIX('x', 'y')", "UNIX_TIMESTAMP('x', 'y')", write="spark")
        self.validate("TIME_TO_STR(x, 'y')", "DATE_FORMAT(x, 'y')", write="spark")

        self.validate(
            "TIME_TO_UNIX(x)",
            "UNIX_TIMESTAMP(x)",
            write="spark",
        )
        self.validate("UNIX_TO_STR(123, 'y')", "FROM_UNIXTIME(123, 'y')", write="spark")
        self.validate(
            "UNIX_TO_TIME(123)",
            "CAST(FROM_UNIXTIME(123) AS TIMESTAMP)",
            write="spark",
        )
        self.validate(
            "CREATE TEMPORARY TABLE test AS SELECT 1",
            "CREATE TEMPORARY VIEW test AS SELECT 1",
            write="spark2",
        )

    def test_index_offset(self):
        with self.assertLogs(helper_logger) as cm:
            self.validate("x[0]", "x[1]", write="presto", identity=False)
            self.validate("x[1]", "x[0]", read="presto", identity=False)

            self.validate("x[x - 1]", "x[x - 1]", write="presto", identity=False)
            self.validate(
                "x[array_size(y) - 1]",
                "x[(CARDINALITY(y) - 1) + 1]",
                write="presto",
                identity=False,
            )
            self.validate("x[3 - 1]", "x[3]", write="presto", identity=False)
            self.validate("MAP(a, b)[0]", "MAP(a, b)[0]", write="presto", identity=False)

            self.assertEqual(
                cm.output,
                [
                    "INFO:sqlglot:Applying array index offset (1)",
                    "INFO:sqlglot:Applying array index offset (-1)",
                    "INFO:sqlglot:Applying array index offset (1)",
                    "INFO:sqlglot:Applying array index offset (1)",
                ],
            )

    def test_identify_lambda(self):
        self.validate("x(y -> y)", 'X("y" -> "y")', identify=True)

    def test_identity(self):
        self.assertEqual(transpile("")[0], "")
        for sql in load_sql_fixtures("identity.sql"):
            with self.subTest(sql):
                self.assertEqual(transpile(sql)[0], sql.strip())

    def test_command_identity(self):
        for sql in (
            "ALTER AGGREGATE bla(foo) OWNER TO CURRENT_USER",
            "ALTER DOMAIN foo VALIDATE CONSTRAINT bla",
            "ALTER ROLE CURRENT_USER WITH REPLICATION",
            "ALTER RULE foo ON bla RENAME TO baz",
            "ALTER SEQUENCE IF EXISTS baz RESTART WITH boo",
            "ALTER TABLE integers DROP PRIMARY KEY",
            "ALTER TABLE table1 MODIFY COLUMN name1 SET TAG foo='bar'",
            "ALTER TABLE table1 RENAME COLUMN c1 AS c2",
            "ALTER TABLE table1 RENAME COLUMN c1 TO c2, c2 TO c3",
            "ALTER TABLE table1 RENAME COLUMN c1 c2",
            "ALTER TYPE electronic_mail RENAME TO email",
            "ALTER schema doo",
            "CALL catalog.system.iceberg_procedure_name(named_arg_1 => 'arg_1', named_arg_2 => 'arg_2')",
            "COMMENT ON ACCESS METHOD gin IS 'GIN index access method'",
            "CREATE OR REPLACE STAGE",
            "EXECUTE statement",
            "EXPLAIN SELECT * FROM x",
            "LOAD foo",
            "OPTIMIZE TABLE y",
            "PREPARE statement",
            "SET -v",
            "SET @user OFF",
            "SHOW TABLES",
            "VACUUM FREEZE my_table",
        ):
            with self.subTest(sql):
                with self.assertLogs(parser_logger) as cm:
                    self.assertEqual(transpile(sql)[0], sql)
                    assert f"'{sql[:100]}' contains unsupported syntax" in cm.output[0]

    def test_normalize_name(self):
        self.assertEqual(
            transpile("cardinality(x)", read="presto", write="presto", normalize_functions="lower")[
                0
            ],
            "cardinality(x)",
        )

    def test_partial(self):
        for sql in load_sql_fixtures("partial.sql"):
            with self.subTest(sql):
                self.assertEqual(transpile(sql, error_level=ErrorLevel.IGNORE)[0], sql.strip())

    def test_pretty(self):
        for _, sql, pretty in load_sql_fixture_pairs("pretty.sql"):
            with self.subTest(sql[:100]):
                generated = transpile(sql, pretty=True)[0]
                self.assertEqual(generated, pretty)
                self.assertEqual(parse_one(sql), parse_one(pretty))

    def test_pretty_line_breaks(self):
        self.assertEqual(transpile("SELECT '1\n2'", pretty=True)[0], "SELECT\n  '1\n2'")
        self.assertEqual(
            transpile("SELECT '1\n2'", pretty=True, unsupported_level=ErrorLevel.IGNORE)[0],
            "SELECT\n  '1\n2'",
        )

    @mock.patch("sqlglot.parser.logger")
    def test_error_level(self, logger):
        invalid = "x + 1. ("
        expected_messages = [
            "Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Aliases'>. Line 1, Col: 8.\n  x + 1. \033[4m(\033[0m",
            "Expecting ). Line 1, Col: 8.\n  x + 1. \033[4m(\033[0m",
        ]
        expected_errors = [
            {
                "description": "Required keyword: 'expressions' missing for <class 'sqlglot.expressions.Aliases'>",
                "line": 1,
                "col": 8,
                "start_context": "x + 1. ",
                "highlight": "(",
                "end_context": "",
                "into_expression": None,
            },
            {
                "description": "Expecting )",
                "line": 1,
                "col": 8,
                "start_context": "x + 1. ",
                "highlight": "(",
                "end_context": "",
                "into_expression": None,
            },
        ]

        transpile(invalid, error_level=ErrorLevel.WARN)
        for error in expected_messages:
            assert_logger_contains(error, logger)

        with self.assertRaises(ParseError) as ctx:
            transpile(invalid, error_level=ErrorLevel.IMMEDIATE)

        self.assertEqual(str(ctx.exception), expected_messages[0])
        self.assertEqual(ctx.exception.errors[0], expected_errors[0])

        with self.assertRaises(ParseError) as ctx:
            transpile(invalid, error_level=ErrorLevel.RAISE)

        self.assertEqual(str(ctx.exception), "\n\n".join(expected_messages))
        self.assertEqual(ctx.exception.errors, expected_errors)

        more_than_max_errors = "(((("
        expected_messages = (
            "Required keyword: 'this' missing for <class 'sqlglot.expressions.Paren'>. Line 1, Col: 4.\n  (((\033[4m(\033[0m\n\n"
            "Expecting ). Line 1, Col: 4.\n  (((\033[4m(\033[0m\n\n"
            "Expecting ). Line 1, Col: 4.\n  (((\033[4m(\033[0m\n\n"
            "... and 2 more"
        )
        expected_errors = [
            {
                "description": "Required keyword: 'this' missing for <class 'sqlglot.expressions.Paren'>",
                "line": 1,
                "col": 4,
                "start_context": "(((",
                "highlight": "(",
                "end_context": "",
                "into_expression": None,
            },
            {
                "description": "Expecting )",
                "line": 1,
                "col": 4,
                "start_context": "(((",
                "highlight": "(",
                "end_context": "",
                "into_expression": None,
            },
        ]
        # Also expect three trailing structured errors that match the first
        expected_errors += [expected_errors[1]] * 3

        with self.assertRaises(ParseError) as ctx:
            transpile(more_than_max_errors, error_level=ErrorLevel.RAISE)

        self.assertEqual(str(ctx.exception), expected_messages)
        self.assertEqual(ctx.exception.errors, expected_errors)

    @mock.patch("sqlglot.generator.logger")
    def test_unsupported_level(self, logger):
        def unsupported(level):
            transpile(
                "SELECT MAP(a, b), MAP(a, b), MAP(a, b), MAP(a, b)",
                read="presto",
                write="hive",
                unsupported_level=level,
            )

        error = "Cannot convert array columns into map."

        unsupported(ErrorLevel.WARN)
        assert_logger_contains("\n".join([error] * 4), logger, level="warning")

        with self.assertRaises(UnsupportedError) as ctx:
            unsupported(ErrorLevel.RAISE)
        self.assertEqual(str(ctx.exception).count(error), 3)

        with self.assertRaises(UnsupportedError) as ctx:
            unsupported(ErrorLevel.IMMEDIATE)
        self.assertEqual(str(ctx.exception).count(error), 1)

    def test_recursion(self):
        sql = "1 AND 2 OR 3 AND " * 1000
        sql += "4"
        self.assertEqual(len(parse_one(sql).sql()), 17001)
